Do stains come out over time?
The longer a stain is left untreated, the less likely it is to be removed. When a spill first occurs, it sits on the surface of the fabric, but over time, that spill can start to react with the fabric causing the fabric to actually change colors.
Can stains be permanent?
Spills such as coffee, tea, sodas, and other drinks can also cause permanent stains, especially on wool, some nylons, silk, and cotton. Even “stain resistant” nylon carpets can be permanently stained by HOT coffee, HOT tea, and other common foods, as well as bleach household chemicals or medicines.
Do stains eventually fade?
"The good news is that almost any stain will come out eventually," says Mr. Macpherson. As for stain-removal sprays and pre-treatments, these can be useful, but you will still have to rinse, check the stain and repeat if necessary.
Can old stains still be removed?
Removing set-in stains that have been washed and dried can be a challenge, but there are a few things you can try to help remove the stain: Use a stain remover: You can try using a stain remover specifically designed for set-in stains, such as OxiClean or Shout.